Apply the Pythagorean Theorem to find the length between the two points (-2, -1) and (2, 4). Round to the nearest hundredth, if necessary.

A. 6:40
B. 9
C. 5.57
D. 41

1 answer

To find the distance between the two points \((-2, -1)\) and \((2, 4)\), we can use the distance formula derived from the Pythagorean Theorem. The distance \(d\) between two points \((x_1, y_1)\) and \((x_2, y_2)\) is given by:

\[ d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} \]

Here, the coordinates are:

  • \( (x_1, y_1) = (-2, -1) \)
  • \( (x_2, y_2) = (2, 4) \)

Now, substitute the values into the formula:

  1. Calculate \(x_2 - x_1\): \[ x_2 - x_1 = 2 - (-2) = 2 + 2 = 4 \]

  2. Calculate \(y_2 - y_1\): \[ y_2 - y_1 = 4 - (-1) = 4 + 1 = 5 \]

  3. Now substitute these results into the distance formula: \[ d = \sqrt{(4)^2 + (5)^2} = \sqrt{16 + 25} = \sqrt{41} \]

  4. Now, we can calculate \(\sqrt{41}\). The approximate value of \(\sqrt{41}\) (using a calculator) is about \(6.403\).

  5. Finally, rounding to the nearest hundredth gives \(6.40\).

Thus, the correct answer is A. 6:40 (written here as 6.40).